[libvirt] [PATCH v2 33/73] qemu: Check supported caps in qemuMigrationParamsCheck

[Jiri Denemark]

Instead of checking each capability at the time we want to set it in
qemuMigrationParamsSetCapability we can check all of them at once in
qemuMigrationParamsCheck.

Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
---
 src/qemu/qemu_migration.c        |  6 ++++--
 src/qemu/qemu_migration_params.c | 33 ++++++++++++++++++--------------
 src/qemu/qemu_migration_params.h |  3 ++-
 3 files changed, 25 insertions(+), 17 deletions(-)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 3f443a756b..eb544bbb77 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -2398,7 +2398,8 @@ qemuMigrationDstPrepareAny(virQEMUDriverPtr driver,
                                        migParams) < 0)
         goto stopjob;
 
-    if (qemuMigrationParamsCheck(driver, vm, QEMU_ASYNC_JOB_MIGRATION_IN) < 0)
+    if (qemuMigrationParamsCheck(driver, vm, QEMU_ASYNC_JOB_MIGRATION_IN,
+                                 migParams) < 0)
         goto stopjob;
 
     /* Migrations using TLS need to add the "tls-creds-x509" object and
@@ -3360,7 +3361,8 @@ qemuMigrationSrcRun(virQEMUDriverPtr driver,
                                          true, migParams) < 0)
         goto error;
 
-    if (qemuMigrationParamsCheck(driver, vm, QEMU_ASYNC_JOB_MIGRATION_OUT) < 0)
+    if (qemuMigrationParamsCheck(driver, vm, QEMU_ASYNC_JOB_MIGRATION_OUT,
+                                 migParams) < 0)
         goto error;
 
     if (flags & VIR_MIGRATE_TLS) {
diff --git a/src/qemu/qemu_migration_params.c b/src/qemu/qemu_migration_params.c
index faaaa29cc9..a7b5ce385e 100644
--- a/src/qemu/qemu_migration_params.c
+++ b/src/qemu/qemu_migration_params.c
@@ -182,23 +182,11 @@ qemuMigrationParamsApply(virQEMUDriverPtr driver,
 
 
 int
-qemuMigrationParamsSetCapability(virDomainObjPtr vm,
+qemuMigrationParamsSetCapability(virDomainObjPtr vm ATTRIBUTE_UNUSED,
                                  qemuMonitorMigrationCaps capability,
                                  bool state,
                                  qemuMigrationParamsPtr migParams)
 {
-    if (!qemuMigrationCapsGet(vm, capability)) {
-        if (!state) {
-            /* Unsupported but we want it off anyway */
-            return 0;
-        }
-
-        virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED,
-                       _("Migration option '%s' is not supported by QEMU binary"),
-                       qemuMonitorMigrationCapsTypeToString(capability));
-        return -1;
-    }
-
     if (state)
         ignore_value(virBitmapSetBit(migParams->caps, capability));
     else
@@ -413,16 +401,33 @@ qemuMigrationParamsResetTLS(virQEMUDriverPtr driver,
  *
  * Check supported migration parameters and keep their original values in
  * qemuDomainJobObj so that we can properly reset them at the end of migration.
+ * Reports an error if any of the currently used capabilities in @migParams
+ * are unsupported by QEMU.
  */
 int
 qemuMigrationParamsCheck(virQEMUDriverPtr driver,
                          virDomainObjPtr vm,
-                         int asyncJob)
+                         int asyncJob,
+                         qemuMigrationParamsPtr migParams)
 {
     qemuDomainObjPrivatePtr priv = vm->privateData;
     qemuMigrationParamsPtr origParams = NULL;
+    qemuMonitorMigrationCaps cap;
     int ret = -1;
 
+    for (cap = 0; cap < QEMU_MONITOR_MIGRATION_CAPS_LAST; cap++) {
+        bool state = false;
+
+        ignore_value(virBitmapGetBit(migParams->caps, cap, &state));
+
+        if (state && !qemuMigrationCapsGet(vm, cap)) {
+            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED,
+                           _("Migration option '%s' is not supported by QEMU binary"),
+                           qemuMonitorMigrationCapsTypeToString(cap));
+            return -1;
+        }
+    }
+
     if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
         return -1;
 
diff --git a/src/qemu/qemu_migration_params.h b/src/qemu/qemu_migration_params.h
index 4cb70f62a4..7ca667a507 100644
--- a/src/qemu/qemu_migration_params.h
+++ b/src/qemu/qemu_migration_params.h
@@ -101,7 +101,8 @@ qemuMigrationParamsSetCompression(virDomainObjPtr vm,
 int
 qemuMigrationParamsCheck(virQEMUDriverPtr driver,
                          virDomainObjPtr vm,
-                         int asyncJob);
+                         int asyncJob,
+                         qemuMigrationParamsPtr migParams);
 
 void
 qemuMigrationParamsReset(virQEMUDriverPtr driver,
-- 
2.17.0